Journal of Quantitative Analysis in Sports - Articles come from a wide variety of sports and perspectives and deal with tournament structure, and frequency and occurrence of records
Operations Research in Sports - Promotes research, theory, methodologies, and applications of operations research and management science to sports problems.
Sf Stats - Provides soccer, basketball, handball and icehockey statistics from many leagues worldwide.
Sportheory: College Sports Rankings - Calculates various rankings and statistics of college sport teams: football, basketball, baseball, softball and ice hockey.
Sports Club Stats - Calculates MLB, NFL, NBA, and NHL teams' odds of making the playoffs and which upcoming games will impact those odds.